Let's see what happened in WWII from June 1940 to December 1941...

July 10, 1940 - start of 3-month air war; Goering vs. RAF

ends Oct 30 after 57-day Blitz on London

Brit. lose 832 fighters; Ger. lose 668 plus 600 bombers

July 23, 1940 - Soviets take Lithuania, Latvia and Estonia.

Aug 3-19 - Italians occupy British Somaliland in East Africa.

Sept 13, 1940 - Italians invade Egypt

Oct 7, 1940 - German troops enter Romania.

Oct 28, 1940 - Italy invades Greece.

Nov 10/11 - A torpedo bomber raid cripples the Italian fleet at Taranto, Italy.

Nov 22, 1940 - Greeks defeat the Italian 9th Army.

Dec. 9 - Wavell in Egypt defeats Italians and enters Libya

takes Bardia Jan. 3, Tobruk Jan. 21, Derna Jan. 30

Jan. 19 - Brit begin East Africa campaign against Italians

Feb 11, 1941 - British forces advance into Italian Somaliland in East Africa.

Feb 12, 1941 - German General Erwin Rommel arrives in Tripoli, North Africa.

Feb 14, 1941 - First units of German 'Afrika Korps' arrive in North Africa.

March 7, 1941 - British forces arrive in Greece.

March 27, 1941 - A coup in Yugoslavia overthrows the pro-Axis government.

April 3, 1941 - Pro-Axis regime set up in Iraq.

April 6, 1941 - Nazis invade Greece and Yugoslavia.

April 14, 1941 - Rommel attacks Tobruk.

April 17, 1941 - Yugoslavia surrenders to the Nazis.

April 27, 1941 - Greece surrenders to the Nazis.

May 1, 1941 - German attack on Tobruk is repulsed.

May 10/11 - Heavy German bombing of London; British bomb Hamburg.

May 15, 1941 - Operation Brevity begins (the British counter-attack in Egypt).

May 24, 1941 - Sinking of the British ship Hood by the Bismarck.

May 27, 1941 - Sinking of the Bismarck by the British Navy.

June 4, 1941 - Pro-Allied government installed in Iraq.

June 8, 1941 - Allies invade Syria and Lebanon.

June 22, 1941 - Germany attacks Soviet Union as Operation Barbarossa begins.

In June - Nazi SS Einsatzgruppen begin mass murder.

June 28, 1941 - Germans capture Minsk.

July 3, 1941 - Stalin calls for a scorched earth policy.

July 10, 1941 - Germans cross the River Dnieper in the Ukraine.

July 12, 1941 - Mutual Assistance agreement between British and Soviets.

July 14, 1941 - British occupy Syria.

Aug 20, 1941 - Nazi siege of Leningrad begins.

Sept 3, 1941 - First experimental use of gas chambers at Auschwitz.

Sept 19, 1941 - Nazis take Kiev.

Sept 29, 1941 - Nazis murder 33,771 Jews at Kiev.

Oct 2, 1941 - Operation Typhoon begins (German advance on Moscow).

Oct 16, 1941 - Germans take Odessa.

Oct 24, 1941 - Germans take Kharkov.

Oct 30, 1941 - Germans reach Sevastopol.

Nov 13, 1941 - British aircraft carrier Ark Royal is sunk off Gibraltar by a U-boat.

Nov 20, 1941 - Germans take Rostov.

Nov 27, 1941 - Soviet troops retake Rostov.

Nov. 30 - Winter war began in Finland, Russia attacked with 30 divisions, Finns defended behind the Mannerheim Line, Russia lost 200,000 but defeated Finland by Mar. 12 treaty

Dec 5, 1941 - German attack on Moscow is abandoned.

Dec 6, 1941 - Soviet Army launches a major counter-offensive around Moscow.

Dec 7, 1941 - Japanese bomb Pearl Harbor; Hitler issues the Night and Fog decree.

Dec 8, 1941 - United States and Britain declare war on Japan.

Dec 11, 1941 - Germany declares war on the United States.

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Maybe not much happened in the US in that time, but obviously lots happened in Europe, including one of the major air battles of all time, the Battle of Britain.